Experiment based on spacesuit “Orlan‐M”: Neutron fluxes from thunderstorms

Drozdov, Alexander; Amelushkin, A. M.; Bratolyubova-Tsulukidze, L. S.; Churilo, I.; Grigoriev, A. V.; Grigoryan, O. R.; Иудин, Д. И.; Mareev, E. A.; Nechaev, O. Yu.; Petrov, V. I.

doi:10.1029/2009ja014903

Cited by 5 publications

(5 citation statements)

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“…The other result in TAE study could be connected to the possibilities of neutron detection. Simulation predicts detection of about two neutrons for event time 30 ms at the orbit with 450 km altitude, by the detector with 60 cm 2 effective area (Drozdov et al (2010); Grigoriev et al (2010)). This result implies that detection of significant number of neutrons from TGFs is possible using the detector with effective area of about several hundred square centimeter.…”

Section: Discussion and Resultsmentioning

confidence: 96%

“…The simulation of neutrons generated by gamma quanta during their propagation in the atmosphere was made also by (Drozdov et al 2010) and (Grigoriev et al 2010). They simulated the albedo neutron background and thunderstorm-produced neutrons, and then compared albedo and thunderstorm neutrons spectral parameters to estimate possibility of thunderstorm neutron detection in orbits with different altitudes up to 450 km.…”

Section: The Specific Problems Of Tgf Studymentioning

confidence: 99%

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Universat-SOCRAT multi-satellite project to study TLEs and TGFs

Panasyuk

Климов

Свертилов

et al. 2019

Prog Earth Planet Sci

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We present concept of a new multi-satellite Universat-SOCRAT project aimed to study transient phenomena in the upper atmosphere such as transient luminous events (TLEs) and terrestrial gamma-ray flashes (TGFs). It is a new space project of Lomonosov Moscow State University based on the use of a few satellites in the near-Earth orbit for real-time monitoring of radiation environment, natural (asteroids, meteoroids) and artificial (space debris) potentially dangerous objects, electromagnetic transients including cosmic gamma-ray bursts, terrestrial gamma-ray flashes, and optical and ultraviolet bursts in the Earth's atmosphere. Study of TLEs and TGFs remains an important and demanding task despite of a multitude of recently acquired data for these phenomena. This might be explained by the absence of comprehensive theoretical understanding of physical nature of high-energy processes in the Earth's atmosphere. Multi-wavelength synchronous observations with moderate accuracy of localization of TGF and TLE events are necessary to gain an insight of physics governing these high-energy processes in the Earth's atmosphere. In the article, we present results of TLE observations in space experiments of Moscow State University and discuss advanced instruments for optical observations of TLEs, as well as gamma-ray burst monitor and tracking gamma spectrometer for TGFs observations.

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Section: Discussion and Resultsmentioning

confidence: 96%

Section: The Specific Problems Of Tgf Studymentioning

confidence: 99%

Universat-SOCRAT multi-satellite project to study TLEs and TGFs

Panasyuk

Климов

Свертилов

et al. 2019

Prog Earth Planet Sci

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“…Completing our brief report we would like to pay attention to some observations that can be done on the basis of the obtained results. In the work of Drozdov et al [2010] a peculiarity is indicated consisting in the lack of the neutron bursts over the American near‐equatorial thunderstorm system while over the other main near‐equatorial thunderstorm systems (Asian, Pacific and African) they were detected. It is a kind of small obstacle for the nowadays conventional view on the origin of the neutrons.…”

Section: Discussionmentioning

confidence: 99%

“…For the needs of the experiment “Radioskaf,” we elaborated the CA scheme modeling neutrons transport in matter. The experiment is planned to conduct at the Moscow Sate University [ Drozdov et al , 2010]. The goals of the experiment are to prove the idea of neutron generation in thunderstorms, to explore main neutron fluxes features and to throw the light on the neutrons nature.…”

Section: Analysis and Modelingmentioning

confidence: 99%

“…In other words, consistency of the hole sketched picture may be verified. Another aim is to give a rough value of the count rate over the altitude for the planned experiment “Radioskaf” [ Drozdov et al , 2010], at the same time determining the necessary experiment configuration (the type of neutron detectors). As we do not need an accurate result, we will perform only an estimating analysis in our work, revealing the main physical processes.…”

Section: Introductionmentioning

confidence: 99%

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Thunderstorm neutrons in near space: Analyses and numerical simulation

et al. 2010

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[1] In this paper we perform a theoretical analysis of the direct passage of neutrons in the atmosphere from an altitude of about 5 km up to several hundred kilometers. We consider that these neutrons are generated during thunderstorms in what favor there is some experimental evidence. Two main mechanisms of the neutrons generation in thunderstorms appeared in the literature: the nuclear synthesis directly in the lightning channel and the photonuclear synthesis owing to production of gamma-rays by the runaway electrons. Both of them are discussed in the present work. For the qualitative analysis we considered the process of neutrons propagation in the atmosphere as consisting of three stages: initial neutron deceleration to thermal energies, then diffusion, and further free propagation. Absorption of neutrons was neglected. Also, in modeling the atmospheric matter only nitrogen and oxygen were considered as the main atmospheric components. With these conditions and taking into account the predicted parameters of the neutron generation source, it is shown that the estimated flux well corresponds to the known experimental results. On this basis the preferred mechanism of the neutron generation is indicated. For a more rigorous picture of the neutrons propagation, capable for description of the slowing down, thermalization, and diffusion processes, one has to perform a numerical calculation and for this we propose a computer simulation scheme based on the cellular automation method. The corresponding plain analysis of the neutrons passage confirms the estimation mentioned above. The proposed scheme can be used for modeling the real neutron source. On the basis of our results we discuss some characteristic features of the observed neutron fluxes. The obtained results are to be tested by the "Radioskaf" experiment based on the scientific device called "RAZREZ." One of the experiment objectives is detection of neutrons with different energies at altitudes of 200-400 km aiming to reveal the nature and characteristics of the neutron radiation source.Citation: Grigoriev,

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